html{
    font-family: Helvetica, Tahoma, "Microsoft YaHei", "PingFang SC", sans-serif;
}
.flex-y{
    display: flex;
    align-items: center;
}
.reveal p.no-margin{
    margin: 0;
    font-size: 26px;
}
.reveal section img.width-500{
    width: 500px;
}
.reveal section img.width-400{
    width: 400px;
}
.reveal section img.width-300{
    width: 300px;
}


.reveal section img.img3:last-child{
    margin-right: 0;
}

